UNS NO7718 Inconel 718 Rod Corrosion Resistant For High Temperature Bolts / Fasteners

Nickel Alloy Forging Bar Inconel 718 Bolts Bearings UNS NO7718 Gears Shafts

Nickel Alloy Forged Bar vs Hot Rolled vs Cold Rolled Bar:  Rolling and forging bar boils down to the same fundamental process of reducing the thickness or changing the cross-sectional area of metal by compressive forces. In other words, a large piece of metal known as a billet is pressed down to the size, shape, and length required for a project. This process not only gives the bar shape, but it also adds properties of strength to the bar.

• FORGED BAR his process, like a hot rolled bar, takes a billet and heats it until it is malleable. This is where the processes differ, rather than rolling the bar to get it to size, forging either hammers or presses the bar to the rough dimensions required. The operation gives the bar a 3:1 reduction ratio minimum, which means that the grain sizes are much smaller and tighter in a forged bar, and it consolidates the centers if there are any piping issues. Then, depending on the diameter of the bar, the bar is put through a planishing mill giving it a smooth, rounded surface.
• HOT ROLLED BAR  This is the process of heating a billet to more than 1000 degrees Fahrenheit, above the recrystallizing phase of metal so that it’s workable, then rolling it through a planishing mill or rollers to give it its shape. Heating the metal is vital because changing the molecular structure of the metal form dendrites (thread-like sporadic structures) to grains (organized block-like structures), which only happens when metal is in a malleable state. The creation of stronger metal is not only due to the formation of the grains, but the directional grain flow achieved when the bar is rolled.
• COLD ROLLED BAR   This process takes everything we just discussed about Hot Rolled Bar and adds a step. When the bar reaches near-room temperature, it is drawn through dies or rerolled in a progressive rolling process. This additional step inherently adds strain hardening to the bar because it is worked after recrystallization. Strain hardening can only harden the metal so much, the bulk of hardening is achieved during the molecular restructuring provided by hot rolling, depending on the grade.

Inconel 718(UNS NO7718)  is a precipitation hardenable Ni-Cr-Fe alloy engineered for extremely high yield strength and tensile strength from cryogenic temperatures up to 1400 °C. Its aging process is slow, allowing inconel 718 to be welded without spontaneous hardening. Unlike nickel alloys hardened with aluminum or titanium, inconel 718 is very weldable, and is well suited for SLM. Like most nickel alloys, inconel 718 has excellent corrosion resistance in its useful temperature range.

Applications:

• High temperature bolts and fasteners
• Gas turbine components
• Aircraft engine components
• Cryogenic applications

Material Properties:

• High strength and creep resistance
• High corrosion resistance
• High performance at elevated temperatures
• Excellent weldability

Mechanical Properties:
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Chemical Composition:

Our QC Activities and Test Methods:

* Done by state own third party laboratory

Processing Flow Chart: